Question

Three positive charges of equal value $$q$$ are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in

A.

Electric Field mcq option image

B.

Electric Field mcq option image

C.

Electric Field mcq option image

D.

Electric Field mcq option image

Answer : Electric Field mcq option image

Electric Field mcq option image

Solution :
Electric field lines do not form closed loops. Therefore options (A), (B) and (D) are wrong.
Option (C) is correct. There is repulsion between similar charges.

Releted MCQ Question on
Electrostatics and Magnetism >> Electric Field

Releted Question 1

A hollow metal sphere of radius $$5 cms$$ is charged such that the potential on its surface is $$10\,volts.$$ The potential at the centre of the sphere is

A. zero

B. $$10\,volts$$

C. same as at a point $$5 cms$$ away from the surface

D. same as at a point $$25 cms$$ away from the surface

Releted Question 2

Two point charges $$ + q$$ and $$ - q$$ are held fixed at $$\left( { - d,o} \right)$$ and $$\left( {d,o} \right)$$ respectively of a $$x-y$$ coordinate system. Then

A. The electric field $$E$$ at all points on the $$x$$-axis has the same direction

B. Electric field at all points on $$y$$-axis is along $$x$$-axis

C. Work has to be done in bringing a test charge from $$\infty $$ to the origin

D. The dipole moment is $$2qd$$ along the $$x$$-axis

Releted Question 3

Three positive charges of equal value $$q$$ are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in

A.

Electric Field mcq option image

B.

Electric Field mcq option image

C.

Electric Field mcq option image

D.

Electric Field mcq option image

Releted Question 4

A uniform electric field pointing in positive $$x$$-direction exists in a region. Let $$A$$ be the origin, $$B$$ be the point on the $$x$$-axis at $$x = + 1cm$$ and $$C$$ be the point on the $$y$$-axis at $$y = + 1cm.$$ Then the potentials at the points $$A,B$$ and $$C$$ satisfy:

A. $${V_A} < {V_B}$$

B. $${V_A} > {V_B}$$

C. $${V_A} < {V_C}$$

D. $${V_A} > {V_C}$$

Practice More Releted MCQ Question on
Electric Field

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